According to Mustard, Leon was once his best student at the Master Dojo, but he was never able to finish his training there, as he never made it to the Towers of Two Fists due to his horrible sense of direction. His catchphrase is 'Let's have a champion time!'. However, he is also known for his poor sense of directions.
He has been referred to as 'the unbeatable Champion' and 'the greatest Trainer in all of Galar.' He is considered a hero to many Trainers in Galar. Since then, he and his partner have remained undefeated in every league and exhibition they participated in. He proceeded to win his first-ever Gym Challenge and become the Champion of the Galar League, without losing a single battle. Leon originally started out as a Trainer at the age of 10 with his partner Charizard when he entered the Gym Challenge after he was endorsed by Rose, who saw talent in him.
